Recital 19

(19)In order to ensure full comparability of the harmonised indices, uniform conditions are needed for the application of the ECOICOP for the purpose of the HICP and the HICP-CT; for the breakdown of the flash estimate of the HICP provided by Member States whose currency is the euro; for the breakdowns of the OOH price index and of the HPI; for the quality of weights of the harmonised indices; for improved methods based on voluntary pilot studies; for the appropriate methodology; for detailed rules on the rescaling of the harmonised indices; for the data and metadata exchange standards; for the revision of the harmonised indices and their sub-indices; and for technical quality assurance requirements regarding the content of annual standard quality reports, the deadline for providing the reports to the Commission (Eurostat) and the structure of the inventories and the deadline for providing the inventories to the Commission (Eurostat). In order to ensure such uniform conditions for the implementation of this Regulation, implementing powers should be conferred on the Commission. Those powers should be exercised in accordance with Regulation (EU) No 182/2011 of the European Parliament and of the Council ⁶ .